Meter-box cover.



J. W. CALHOUN'.

METER BOX COVER.

APPLICATION FILED FEB.2.1918.

nu: .mums f-:rsns camworournu., wAsNmamN. n. c.

1 n anniv w. CALHOUN, or CHESTER, PENNSYLVANIA.

' METER-Box Covnn. f

Be it known that I, JOHN W. CALHonN,

y a `citizen of thefUnited States, residing at Chester, in -the `county of Delaware and State of Pennsylvania, have invented new and useful Improvements in Meter-Box Covers, of which the following is a `specilication.

a This inventionfrelates to closuresf'for man holes andV is especially designed for use in connection with water meters'andthe like; The `primaryV object of theinvention is to f. provide a cover or closurefor manhole casing which may be `quickly and easily applied or removed, the,- application of the` cover providing forautomatically locking the same in position, so that it'may not` be removed byA unauthorized persons.

` Another objectA of the'invention is to provide means for associating the cover with the manhole casing in a manner to provide for adjusting` the `height of the top of the cover to the elevation of the roadway or 1 of the lid diilicult.

sidewalk, so` that" should. the elevation vbe changed, the cover may be easily and quickly adjustedtheretor` A further `object is to provide means `for preventing the warmair from the man hole the man hole casing through the medium of..

an adjustable extension, said lid having an Ying a supplemental closure positioned be automatic locking engagement with the extension, so that when the lid is positioned upon the man hole the former will beV automatically turned into locking engagement with the latter, thereby securely holding the lid in place.

The invention further consists in providlow the lid and hingedly secured at the bot'- tom of the cover extension, the supplemental Closure being normally heldin position to close the man hole and providing a dead vair space within the extension, so that the warm air of the man hole is prevented from` reaching the upper lid or entering the extension. v

In the drawings,

Speciicationof Letters Patent;

Application filed February 2, 1918. `"Serial No. 215,195.

the upper operating Patented oet. 1,1818.

upper operating mechanism of the man hole positioned within the sidewalk.- f

F ig. 2 is a vertical sectional view through mechanism of the man holeandv Cover.` i n A 4lig. V3 is a plan view of the" cover removed, an e, Fig.` 4 is a detailed perspective view of the upperclosure of lid. V j Referring to f the drawings1 in detail, wherein like characters of reference denote corresponding parts', the casing of aman hole is indicated at 10.` This casing may represent the man hole of a sewer,` an electric conduit or a Water meter, the invention being equally applicable to these and `va. A

rious other uses, it being only necessary to change the proportions of thecover itfor the particular use intended.f

The cover is designated at 11 andvincludes sections l2 and 13. lThe former section comprises afdisk `14 of sulfcient size to cover the top of the casing l0, the said disk being provided with an annular flangerl spaced from the edge thereof, which forms an annular shoulder or seat forthe reception of the upper edge of the casing 10 and retains the cover in position. The disk 14 is formed with a central opening which is surrounded a Vthreaded extension 16 which is de-` signed Orengagement with the' threaded endl of the section'lB. The central opening in the disk 14 is also provided witha downwardly extending lateral flange 18 which forms a seat for a closure 19, the latto adapt ter being hingedly or pivotally` secured` between` ears 2O carried by the disk 14. Se-

cured to the closure 19 is a counterbalance weight 2l n which is designed to normally maintain the said closure in engagement with the flange 18 so that the opening in the disk 14 will be normally closed. Whenthe closure 19 is opened for any purpose, the weight 21 will automatically return the said closure to its normal position.

The section 13 is provided near the top thereof with an annular liange 22, the said flange being spaced from the top and providing a seat for the upper closure or lid 28. This latter carries a plurality of depending legs 24, which are notched as shown at 25 Vto receive the `inwardly extending flange 22 when the lid is in position.V The flange 22 is interrupted as shown at 26 at spaced i11- tervals toprovide for the insertion of the Figure 1 is a view in side elevation of the legs 24, each of the spaces shown at 26 hav- Ving located adjacent thereto an arcuateY guide or cam surface 27, which is. designed for contact With the legs 24. In posit'ioningA the lid 23 the latter Will be partly revolvedV4 through contact with the legs 24, the cam surface 27 causing thenotches 25 to: engage over the flange 22 and thus securely hold the lid in position, the Weightof tlielid acting to cause such pressure rotation.

By forming theexteiision oit'the sections 12 and 13 the lid or top `of the cover may be `adjusted to the propei1 height Vto maintain the sameush with the surface of the roadwayor sidewalk. By raising oriloiveringt'he 'cover it 'may be adjusted Without the Vnecessity .of adjusting the casingftO. By 'providing the auxiliary closure" '19, Warm air from the man holeis prevented from reaching the upper lid 23 andmelting the frost; thereby obviating thedaiigerjorfreezingthe moisture which `Would result in thesticlring ofthe lid, the space Within the i entension forming a dead airspace.

Y gageable with the 4top of the manhole icasing, an adjustable extension projecting from saiddisl, a :closure hingedly secured to one eiidvof s aidfextension and :a: lid removably positionedat the opposite end of theexten- 2. A` man hole cover embodying a disk engageable with j the top of the man hole casing, a sectional extension projecting from saidjidislr, an automatically operated closure hingedly secured to one end of said eXtensionl and a; lid removably positioned at` the opposite end of the extension. i

A inanl-ioleicover embodying a dislfL engageable V,With the top ofthe man hole casing, a threaded' exteiisionfprojecting from saidjdisk, a hinged aui'iliaryclosure secured tooneend of saidleiztensionl and a lid removably positioi'iedl atJ opposite "end of the extensioiif eiigageable -Witli thetop offra man `hole cas- .ing` an extension projecting from said-1 dish", a closure hingedly securedto'-one end of said extensioinlfa 'lid reinovalily positioned at `,thelopposite` oiif'the"` extension" and f" s="for` partially rotating the -lid' to lock Aimant-hole covervembodying" 'a disk cngageableiv'it the A` toprH-'o 'the man hole 'j anV elxtension"projecting froinsaid disl,Y a closure hingedly"secv redt() one end of said efitefnsfn, "a tioiiedl`-`at theopposi v by L the A 'extensioiil 1 an iipontheenteiisionnl l A '6. 'A man holecove'rembodying a ldiet: enjgageable with thetop ofjtliefman hole oasingg'f an extension" "rojectingl :from Y said end, a flange lcarried d re ovablyrposir :legst locking `the lid j j P disk, a 'closure hingedlysecured-fto onefeiid o'fthe extension, a lid removablypositioned extension, legs"` carriedrl* byl the lidand "en-" nient wiwi-the `flangest:

iIn testimony whereof I any signature# j Y iivith 'thelegs' l'for au'toin atically 'mo-ving the-latterfinto engage-` 

